pizzas = ['培根披萨','火腿披萨','奶酪披萨']
friends_pizzas = pizzas[:]
for pizza in pizzas:
    print(f'我爱吃{pizza}')
print("我真的喜欢吃披萨")

pizzas.append("香肠披萨")
friends_pizzas.append("水果披萨")
print("我最喜欢的披萨是:")
for pizza in pizzas:
    print(pizza)
print("我朋友最喜欢的披萨是:")
for pizza in friends_pizzas:
    print(pizza)